class_docstr: Identify constant expressions.
class_docstr_tok: ["Identify","constant","expressions","."]
code: def visit_Attribute(self, node):
      return node.attr in ("is_none", "isinstance")
  
file_path: catboost/contrib/python/pythran/pythran/analyses/static_expressions.py
imports: from pythran.passmanager import NodeAnalysis
label_desc: Use image node_id 11 for calling the StaticExpressions obj's underlying member method code with example usage: obj.visit_Attribute(node) and returns: unknown